The Mac App Store launched a few days ago, and one of the first apps I grabbed was the official Twitter one because I use the site obsessively. The app is clean, simple, responsive and a dream to use.

But it's broken.

The app doesn't show my mentions, only my replies. If someone replies to me, I will see it in the Mentions pane. If someone replies to me, but places someone else's @username first, I won't see it in my Mentions pane. If someone refers to me within the context of the tweet, but doesn't address the tweet to me, I won't see it. This makes the app worthless to me, as Twitter.com aggregates all instances of my @username into the same pane.

Here's an example. Using HootSuite, here's what the Mentions column looks like. See that tweet from @tcabeen in the center? I'm the second @username the tweet is addressed to, but it still migrates to the column. This is good.

Here's the Mentions pane in the Twitter for Mac app. The tweet from @tcabeen is nowhere to be found, even though it includes my @username. This is bad.

I don't want to set up a search for my @username within the app in order to see my mentions. Unless, of course, there will be a Pro version of the app that includes all uses of a person's username. Sneaky, Twitter. Very sneaky.

(Thanks to Monika Sue Ellen Runstrom for pointing this out!)